Ch. 26 The Reproductive System

Amerman3rd EditionHuman Anatomy & PhysiologyISBN: 9780138247201, 9780138247928, 9780138201814Not the one you use?Change textbook

Amerman 3rd Edition

Ch. 26 The Reproductive System

Problem 6

Chapter 26, Problem 6

What are the three regions of the male urethra?

Verified step by step guidance

The male urethra is divided into three distinct regions based on its anatomical location and surrounding structures. These regions are the prostatic urethra, the membranous urethra, and the spongy (or penile) urethra.

The prostatic urethra is the first region and is located within the prostate gland. It is the widest part of the urethra and receives the ejaculatory ducts, which contribute to the passage of semen.

The membranous urethra is the shortest and narrowest region. It passes through the urogenital diaphragm, a muscular structure that provides support and control over urination via the external urethral sphincter.

The spongy urethra, also known as the penile urethra, is the longest region. It runs through the corpus spongiosum of the penis and extends to the external urethral orifice, where urine and semen exit the body.

Each region of the male urethra has specific anatomical and functional characteristics that contribute to its role in the urinary and reproductive systems.

Verified video answer for a similar problem:

This video solution was recommended by our tutors as helpful for the problem above.

Was this helpful?

Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Prostatic Urethra

The prostatic urethra is the first segment of the male urethra, located within the prostate gland. It is approximately 3 cm long and serves as a passage for both urine and semen. This region is surrounded by the prostate, which contributes to the seminal fluid, making it a crucial area for reproductive function.

Membranous Urethra

The membranous urethra is the shortest segment of the male urethra, measuring about 1-2 cm in length. It extends from the prostatic urethra to the bulb of the penis and is surrounded by the external urethral sphincter. This region is significant for voluntary control of urination and is more susceptible to injury due to its location.

Spongy Urethra (Penile Urethra)

The spongy urethra, also known as the penile urethra, is the longest segment, measuring about 15-20 cm. It runs through the corpus spongiosum of the penis and opens at the external urethral orifice. This region is essential for the passage of urine and semen, and its structure allows for the urethra to expand during erection.

Recommended video:

Guided course

3:43

Compact and Spongy Bone

Related Practice

Textbook Question

Which of the following ligaments does not attach to the ovaries?

a. Lateral cervical ligaments

b. Broad ligament

c. Ovarian ligament

d. Suspensory ligament

e. All of these attach to the ovaries

views

Textbook Question

Mr. Hassan has recently started getting up during the night to urinate and has also noticed that he is having trouble emptying his bladder. He has made a doctor's appointment, but his wife has already told him that the doctor will want to check his prostate. Do you think his wife is correct? Explain your answer.

views

Textbook Question

Internally, the penis contains three cylindrical erectile bodies, the paired ________ and the ________.

views

Textbook Question

Which of the following hormones is/are not produced by the ovaries?

a. Relaxin

b. Inhibin

c. Estrogens

d. Oxytocin

e. Progesterone

Textbook Question